Improvement in balanced slide-valves



UNITED STATES.y PATENT OEEIcE ALBERT G. BARRETT, OF BARRETT, KANSAS.

IMPROVEMENT IN BALANCED SLIDE-VALVES.

Specification forming part of Letters Patent No. 113,616, dated April 11, 1871.

To all whom it may concern:

Beit known that 1, ALBERT G. BARRETT, of Barrett, in the county of Marshall and State of Kansas, have invented a new and Improved Balance Slide-Valve; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawing, forming a part of this specification.

My invention relates to slide-val ves for steamengines; and the principle thereof consists in sliding the valve under an equilibrium of steam-pressure on the two opposite sides.

The means which I employ in order to embody lny principle and practically exemplify it will now be described, and subsequently specified in the claim.

The drawing exhibits a section showing my improvement.

induction-ports B, and while the pressure from below has no countervailing pressure from above, the valves C will rise and allow arapid ingress of steam to the valve-chest H. This will continue for a few moments, until an equilibrium of steam-pressure is exerted o n both sides of each valve. After this is effected the additional pressure from the weight of the valve will cause it to settle in the desired proximity to the surface over which it is intended to slide, and will retain it in that position until steam is cut 0E from the engine.

Having thus described all that is necessary to a full understanding of my invention, what I esteem to be new, and desire to protect by Letters Patent, is-

A pair of slide-valves, C, having domes F Gr, and arranged in a chamber, H, combined, as described, with a steam-chest, A, cylinder induction-ports B B, exhaustports D D, and steam-channels E E, all relatively arranged to act on the principle specified.

p ALBERT G. BARRETT.

Witnesses:

J. S. PARTHEMER, B. F. BOLTON. 

